Hollow sucker rod mixed chemical agent technique pipe column and working method thereof

Abstract

The invention discloses a hollow sucker rod mixed chemical agent technique pipe column. The hollow sucker rod mixed chemical agent technique pipe column is mainly composed of a sleeve (1) and an oil pipe (2) arranged on the interior of the sleeve (1). A hollow rod (3) extending out of the ground is arranged on the interior of the oil pipe (2). An oil well pump (4) is further arranged on the interior of the oil pipe (2). Further disclosed is a working method based on the pipe column. The hollow sucker rod mixed chemical agent technique pipe column is applicable to oil wells which are low in ground pressure, poor in liquid supply, high in viscosity of crude oil, large in production difficulty and similar in property of thickened oil or oil to super thickened oil.

Description

technical field [0001] The invention relates to a hollow sucker rod mixed with chemical agent process string and a working method thereof. Background technique [0002] As the availability of conventional oil is decreasing day by day, heavy oil is becoming an important energy source for mankind in the next century. After more than 20 years of hard work, the global heavy oil industry has developed faster than conventional oil. The annual output of heavy oil and tar sands has increased from 20 million tons to nearly 100 million tons, and its importance has attracted increasing attention. The difficulty of heavy oil reservoir development is mainly manifested in two aspects: on the one hand, the viscosity of heavy oil is high, and the seepage resistance of heavy oil in the oil layer is large, so that the heavy oil cannot flow from the reservoir to the bottom of the well; on the other hand, even in the reservoir Under certain conditions, the heavy oil can flow into the bottom of...

AI Technical Summary

Problems solved by technology

[0011] The emulsification viscosity reduction technology requires that the concentration of the viscosity reducer aqueous solution should be appropriate. If the concentration is too low, an oil-in-water emulsion cannot be formed; if the concentration is too high, the viscosity of the emulsion will not decrease further, which is uneconomical.

Moreover, some chemicals (such as caustic soda, water glass, etc.) tend to form water-in-oil emulsions at high concentrations, which will instead increase the viscosity of crude oil.

Temperature has little effect on the viscosity of the formed emulsion, but it affects the emulsification effect

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